I had also mentioned this in my exchange with @cicoub. But I’ve been thinking about it since, and I think this information would be better placed in the « devices » tab, with a way to filter all devices requiring an update, whether due to an update of an external integration or an update of a Zigbee device (for example, but there may be other cases…)
I can see a number appearing in the left menu when devices offer an update, just to the right of « Devices » as is the case for « Integration », then a way to identify each device to be updated, and perhaps a « Update All » button.
In short, do for devices what is done for integrations.